Why he's No. 6: It was a huge boost for Alabama's defense when Mosley chose to return for his senior season instead of head for the NFL draft back in December. Mosley was by far the leading tackler for the Tide last year with 107 (14 of them in the loss to Texas A&M) and was a first-team All-American. He has been impacting the program since his first year when he was a freshman All-American. Mosley also had a pair of interceptions last year — including pick-six in the opener against Michigan — and will be the leader of Alabama's defense.